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In this paper, a 4PL Routing Problem (4PLRP) with fuzzy duration time is presented where the fuzzy numbers is used to describe the uncertainty of the duration time. After the description of 4PLRP, a fuzzy programming model is established according to the uncertainty theory. And a crisp equivalent is derived when fuzzy variables are characterized by triangular fuzzy numbers. Then a Kth shortest path...
In the last ten years, Fourth Party Logistics (4PL) has been attracting more and more attention in many relative fields. In this paper, a 4PL Routing Problem (4PLPR) with fuzzy duration time is presented where the fuzzy numbers are used to describe the uncertainty of the duration time. After the description of 4PLRP, a chance-constrained programming for it is established according to the credibility...
In this paper, the vehicle routing problem with fuzzy demands is considered, and in view of vehicle routing problem of multi-vehicle single cart yard has uncertain demand, a multi-objection fuzzy chance constrained program is designed based on fuzzy credibility theory. Then the hybrid genetic algorithm based on fuzzy simulation is given to solve the vehicle routing model. At the same time, the influence...
With the intensification of market competition and fast development of science and technology, many enterprises have begun to realize the importance of logistic distribution vehicle routing problem under uncertainty environment, and begin to pay more attention to the research of this problem. In this paper, The traditional vehicle routing problem with time windows is expanded to the situation that...
In this article, a cooperative coevolutionary genetic algorithm for the solution of fuzzy vehicular routing problem (FVRP) is presented. FVRP is a variant of VRP with time windows; based on additional use of fuzzy due-times for customers' preferences. The objectives of FVRP are the minimization of total number of vehicles in service, total travel distance, and the total waiting time over all vehicles;...
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